CN209432337U - A kind of bimodulus differential pressure pickup of new type gasoline pick up - Google Patents
A kind of bimodulus differential pressure pickup of new type gasoline pick up Download PDFInfo
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- CN209432337U CN209432337U CN201920250946.1U CN201920250946U CN209432337U CN 209432337 U CN209432337 U CN 209432337U CN 201920250946 U CN201920250946 U CN 201920250946U CN 209432337 U CN209432337 U CN 209432337U
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Abstract
The utility model discloses a kind of bimodulus differential pressure pickup of new type gasoline pick up, including sensor housing, the sensor housing is equipped with the connector for being separately connected pressure differential upstream hose and pressure difference downstream hose；The primary diaphragm for detecting upstream pressure and downstream pressure difference and the secondary diaphragm for detecting downstream pressure and environmental pressure difference are also equipped in the sensor shell body, the primary diaphragm and the secondary diaphragm are electrically connected sensor chip；The utility model reliable performance, structure are simple, are easily achieved and can meet six regulation of gasoline state, which is not only capable of measuring upstream and downstream pressure difference value, moreover it is possible to measure GPF downstream pressure value.Enable OBD system to diagnose GPF downstream pipe obscission etc., keeps GPF to work normally, cope with harsh six laws and regulations requirement of state.
Description
Technical field
The utility model belongs to sensor field, and in particular to a kind of bimodulus differential pressure pickup of new type gasoline pick up.
Background technique
On December 23rd, 2016, " light-duty vehicle pollutant emission limit and measurement method (Chinese 6th stage) " publication.
Five emission regulation of state is compared, state six, which increases, monitors automobile grain catcher (GPF).It " is installed on OBD system reply vehicle
The normal work of grain catcher is detected, should be according to individual electronic component (such as: detection use pressure sensor)
J.4.14 the requirement for integrating component monitoring is monitored." it is to meet six emission regulation of state, the post-processing of gasoline state six compares state
Five, a grain catcher (Gasoline Particle Filter, hereinafter referred are increased after three-way catalytic converter
GPF), as shown in figure.The purpose of the device is mainly the particulate matter trapped in gasoline exhaust object, when the particulate matter of trapping reaches
When to a certain amount, i.e., differential pressure pickup measures GPF upstream and downstream pressure difference and reaches setting value.After engine will do it in cylinder at this time
Spray, a small amount of gasoline is injected in three-way catalytic converter, and combustion heat release promotes GPF inlet temperature, is reached to GPF arrested particles
The clean-burning purpose of object, this process are known as GPF regeneration.At present to guarantee that GPF is worked normally, mainly pass through differential pressure pickup
5 are monitored.And it is all pressure difference that single mode differential pressure pickup can only measure the both ends GPF that state, which used in five stages, when the downstream GPF
When pipeline (differential pressure pickup arrives pressure difference downstream hard tube to pressure difference downstream hose again) falls off, OBD system can not diagnose identification problem,
It can not meet six regulation of state.
Utility model content
The purpose of the utility model is to provide a kind of bimodulus differential pressure pickups of new type gasoline pick up, to solve background technique
The problems in.
Technical solution provided by the utility model is: a kind of bimodulus differential pressure pickup of new type gasoline pick up, including passes
Sensor shell, the sensor housing are equipped with the connector for being separately connected pressure differential upstream hose and pressure difference downstream hose；It is described
Primary diaphragm for detecting upstream pressure and downstream pressure difference is also equipped in sensor shell body and for detecting downstream pressure
With the secondary diaphragm of environmental pressure difference, the primary diaphragm and the secondary diaphragm are electrically connected sensor chip.
As a kind of improvement of the utility model, the sensor housing 1 passes through the sealing installation of cover board 5.
The utility model has the advantages that
The utility model reliable performance, structure are simple, are easily achieved and can meet six regulation of gasoline state, which can not only
Measure upstream and downstream pressure difference value, moreover it is possible to measure GPF downstream pressure value.OBD system is enabled to diagnose GPF downstream pipe obscission
Deng, keep GPF work normally, cope with harsh six laws and regulations requirement of state.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1- sensor housing, 2- connector, 3- primary diaphragm, 4- secondary diaphragm, 5- cover board.
Specific embodiment
The embodiments of the present invention are further illustrated with reference to the accompanying drawing.
As shown in Figure 1, the bimodulus differential pressure pickup of one of the present embodiment new type gasoline pick up, including sensor housing
1, the sensor housing 1 is equipped with the connector 2 for being separately connected pressure differential upstream hose and pressure difference downstream hose；The sensor
Primary diaphragm 3 for detecting upstream pressure and downstream pressure difference is also equipped in shell 1 and for detecting downstream pressure and ring
The secondary diaphragm 4 of border pressure difference, the primary diaphragm 3 and the secondary diaphragm 4 are electrically connected sensor chip.
The sensor housing 1 passes through the sealing installation of cover board 5.
The working principle of the utility model is as follows: primary diaphragm 3 built in sensor housing 1 and secondary diaphragm 4, wherein second
Diaphragm 4 deforms under GPF upstream pressure and downstream pressure effect, and then changes internal circuit resistance, in sensor chip output
The electric signal of downstream pressure difference；Primary diaphragm 3 is then deformed in the case where GPF downstream pressure and environmental pressure are made, and exports downstream pressure value
Electric signal；Bimodulus differential pressure pickup is exported using SENT signal, is exactly in this 12bit byte previous generation of the signal1 of SENT
Gauge pressure is poor, and next signal2 this 12bit byte represents downstream pressure.
It is convenient for statement, herein referred "upper", "lower", "left", "right", "front", "rear" etc. represent the description in direction with
The left and right directions of attached drawing itself is consistent, but does not play restriction effect to the structure of the utility model；In addition, the utility model is not
It is confined to above-mentioned specific embodiment, those skilled in the art can also make a variety of variations, but any and the utility model accordingly
Equivalent or similar variation should all be covered in the range of the utility model claims.
Claims (2)
1. a kind of bimodulus differential pressure pickup of new type gasoline pick up, it is characterised in that:
Including sensor housing (1), the sensor housing (1) is equipped with and is separately connected pressure differential upstream hose and pressure difference downstream is soft
The connector (2) of pipe；The first film for detecting upstream pressure and downstream pressure difference is also equipped in the sensor housing (1)
Piece (3) and secondary diaphragm (4) for detecting downstream pressure and environmental pressure difference, the primary diaphragm (3) and second film
Piece (4) is electrically connected sensor chip.
2. a kind of bimodulus differential pressure pickup of new type gasoline pick up according to claim 1, it is characterised in that:
The sensor housing (1) passes through cover board (5) sealing installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920250946.1U CN209432337U (en) | 2019-02-27 | 2019-02-27 | A kind of bimodulus differential pressure pickup of new type gasoline pick up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920250946.1U CN209432337U (en) | 2019-02-27 | 2019-02-27 | A kind of bimodulus differential pressure pickup of new type gasoline pick up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209432337U true CN209432337U (en) | 2019-09-24 |
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ID=67978186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920250946.1U Active CN209432337U (en) | 2019-02-27 | 2019-02-27 | A kind of bimodulus differential pressure pickup of new type gasoline pick up |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209432337U (en) |
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2019
- 2019-02-27 CN CN201920250946.1U patent/CN209432337U/en active Active
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